Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 253,161	$ 216,163	$ 97,849
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(72,559)	(17,210)	11,104
Unrealized (loss) gain on available-for-sale investments	73,696	(15,876)	0
Less: reclassification adjustment for gains recorded in net income	(60,069)	0	0
Other comprehensive income (loss)	(58,932)	(33,086)	11,104
Comprehensive income	194,229	183,077	108,953
Add: Comprehensive loss attributable to noncontrolling interest	67,584	7,539	1,965
Comprehensive income attributable to Qihoo 360 Technology Co. Ltd.	$ 261,813	$ 190,616	$ 110,918

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities and unrealized holding gain (loss) related to transfers of securities into the available-for-sale classification and out of the held-to-maturity classification.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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